1. Histological diagnosis of colorectal cancer. 2） Age: 18 - 75 years. 3） No prior chemotherapy 4） ECOG Performance Status 0 to 2 5) A life expectancy of at least 3 months 6) Adequate function of major organs (bone marrow, heart, lungs, liver etc.). WBC ≧3,500/mm3 and Neutrophil ≧2,000/mm3. Hb ≧10.0 g/dl. Platelet count ≧100,000/mm3. AST and ALT ≦2.5 times the upper limit of normal (excluding liver metastasis). T-Bil ≦1.5 mg/dl. Creatinine ≦1.5 mg/ dl. 7).Patients must have the ability to understand and the willingness to sign a written informed contact document.